#### What type of PR is this?
/area ui
/kind cleanup
/milestone 2.20.x
#### What this PR does / why we need it:
清理 UI 中关于获取 system configmap 的无用代码,目前观察到已经没有任何地方在使用这个数据。
#### Does this PR introduce a user-facing change?
```release-note
None
```
#### What type of PR is this?
/area ui
/kind improvement
/milestone 2.17.x
#### What this PR does / why we need it:
重新组织和固定 UI 部分代码的 imports 导入,防止后续因为 imports 的顺序造成不必要的 diff。
基于:https://github.com/halo-dev/halo/pull/6151
#### Does this PR introduce a user-facing change?
```release-note
None
```